Safety-stop.



'No. 635,222. I Patented Oct. l7, I899.

J. BAGGALEY.

SAFETY STOP.

(Application filed June 1, 1899.)

W! TNE SSE S THE Momma PEIERS co, FHOfO-UYHO., WASHXNGTON u c Umrn maresJOSHUA BAGGALEY, OF NEW YORK, N. Y.

SAFETY-8T0 P.

SPECIFICATION formingpart of Letters Patent No. 635,222, dated October17, 1899.

Application filed June 1, 1899. $erial1l'o. 719,034. (No model.)

To aZZ whom it may concern:

Be it known that I, JOSHUA BAGGALEY, of the city of New York, borough ofManhattan, in the county and State of New York, have invented a new andImproved Safety-Stop, of which the following is a full, clear, and exactdescription.

'The object of my invention is to provide a simple means for preventinga reverse movement of hoisting-engines, particularly when.

an engine is loaded, the device employed being readily and economicallyattached to any type of hoisting-engine.

Another object of the invention is to provide a reversing-check which isautomatically applied and which will render the overhaul easier and willdispense with the necessity of a weight upon the hoisting-rope, enablingthe drum or drums to turn freely in overhauling, the only retardingaction being due to their friction upon their shafts.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both figures.

Figure 1 is side elevation of a portion of a hoisting-engine,illustrating the application of the improvement thereto; and Fig.2 is aside elevation of a portion of the inner face of the engine-frame and atransverse section through the drive-shaft of the engine.

The hoisting-engine A may be of any approved type and is shown asprovided with two drums B and B. Each drum is provided with the usuallever 0, adapted to carry the 40 drums out of engagement with thedriving- 4 of motion of the said wheel.

gear driven from the drive-shaft D of the engine, upon which drive-shaftthe usual crankwheel E is secured.

The main object of this invention is to provide a means for dispensingwith the footbrakes, thereby enabling the attendant of the engine tocontrol the drums with the hands only. To that end the crank-wheel E isprovided with a series of ratchet-teeth 10, which teeth may be on theperiphery, as illustrated, or adjacent to the periphery. The'teethincline in a reverse direction to the direction A pawl 11 is mountedupon theside 13 of the engine-frame or on any convenient fixed support,and said pawl is adapted for engagement with the ratch et-teeth 10 onthe crank-wheel. A spring 14 is usually loosely coiled around thedriveshaft D, and the free end of the said spring is carried indirection of the pawl l1,as shown in Fig. 2, the spring passing betweenguide-pins 15, located on an extension 16 from the side piece 13 of theframe or other support upon which the pawl 11 is pivoted. The free endof the spring is usually made to engage with a pin 17, extending fromthe inner face of the said pawl 11, as is also shown in Fig. 2. When thecrank-wheel E is revolved in a forward direction, so as to produce awinding action on the part of the drums B and B, the spring 14 holds thepawl 11 out of engagement with the ratchet-teeth 10, as shown in Fig. 2,thus preventing any clicking sound during the operation of the engine;but the moment there is a tendency on the part of the engine toreversefor example, under the strain of the load carried thereby.thespring releases the pawl 11 to such an extent, as shown in Fig.1,thatsaid pawl will engage with the ratchet-teeth 10 on the crank-wheel andwill check the said reverse movement or effectually prevent the same.

I desire it to be understood that while the construction described ispreferred a ratchetwheel maybe secured directly upon the driveshaft D ofthe engine, in which event the ratchet-teeth 10 may be omitted from thecrank-wheel E.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with the drive-shaft of ahoisting-engine, and a crank-wheel secured to said drive-shaft andprovided with peripheral ratchet-teeth inclined in a reverse directionto the direction of rotation of said crankwheel, of a pawl mounted upona fixed support and arranged for engagement with the said ratchet-teeth,and a spring carried by said shaft and engaging with said pawl, saidspring acting to hold the pawl out of engagement with the teeth of thecrank-wheel while said wheel revolves in a forward direction, butreleasing said pawl when the crank-wheel and drive-shaft commence toturn in a reverse direction, as specified.

JOSHUA BAGGALEY.

Witnesses:

CHARLES OBRIEN, OTIs W. BIRNIE.

